Enables several functions, including FK506 binding activity; Hsp70 protein binding activity; and type I transforming growth factor beta receptor binding activity. Involved in response to iron ion. Located in axon terminus and intracellular membrane-bounded organelle. Biomarker of Parkinsonism. Orthologous to several human genes including FKBP1A (FKBP prolyl isomerase 1A). [provided by Alliance of Genome Resources, Apr 2022]